LONG-LEGGED SWIMMING CRAB. 363 



described by Mr. Spence Bate as new, in the " Annals 

 of Natural History, for 1851, under the name of Portunus 

 Dalyellii, from a specimen obtained in Oxwich Bay, near 

 Swansea. The lateral spines are very largely developed 

 in the figure given by Mr. Bate, but not more so than in 

 many Mediterranean specimens, and scarcely more than 

 in Roux's figure. It is at a glance distinguished from all 

 other species by the character from which the name has 

 been given, namely, the length and slenderness of the 

 legs. 



